/*    
    OpenMheg - A free MHEG-5 library
    Copyright (C) 2008 Dharmesh Malam

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using System.Text;
using Core.Model.Data.Variables;
using Core.Model.Data.Type;

namespace Core.Model.Data.Generics
{
    public class GenericBoolean : Generic
    {
        private bool? value;

        private ObjectRef indirectReference;

        public GenericBoolean ( bool data )
            : base()
        {
            value = data;
            indirectReference = null;
        }

        public GenericBoolean ( ObjectRef indirectReference )
            : base()
        {
            this.indirectReference = indirectReference;
            value =  null;
        }

        public bool Value
        {
            get
            {
                bool ret = false;

                try
                {
                    ret = value ?? ( ( BooleanVariable ) MHEGEngine.Instance.Find( indirectReference ) ).Value;

                }
                catch ( InvalidCastException e )
                {
                    log.Error( "Indirect value is not "+value.GetType()+", when trying to dereference"+GetType()+". Returning false.", e );

                }
                catch ( NullReferenceException e )
                {
                    log.Error( "Direct and indriect value equal null when trying to dereference "+GetType()+".Returning false.", e );
                }
                
                return ret;
                
            }

            set
            {
                if ( this.value == null )
                {
                    try
                    {
                        BooleanVariable booleanVariable = ( BooleanVariable ) MHEGEngine.Instance.Find( indirectReference );
                        booleanVariable.Value =  value;
                    }
                    catch ( InvalidCastException e )
                    {
                        log.Error( "Indirect value is not "+this.value.GetType()+", when trying to dereference"+GetType()+".", e );
                    }
                }
                else
                {
                    this.value = value;
                }
            }
        }

        public override string ToString ()
        {
            return Value.ToString() +" Direct:"+ ( value!=null ).ToString();
        }


    }
}
